1 /*
2 * Self tests for device tree subsystem
3 */
4
5 #define pr_fmt(fmt) "### %s(): " fmt, __func__
6
7 #include <linux/clk.h>
8 #include <linux/err.h>
9 #include <linux/errno.h>
10 #include <linux/module.h>
11 #include <linux/of.h>
12 #include <linux/list.h>
13 #include <linux/mutex.h>
14 #include <linux/slab.h>
15 #include <linux/device.h>
16
17 static bool selftest_passed = true;
18 #define selftest(result, fmt, ...) { \
19 selftest_passed &= (result); \
20 if (!(result)) \
21 pr_err("FAIL %s:%i " fmt, __FILE__, __LINE__, ##__VA_ARGS__); \
22 }
23
of_selftest_parse_phandle_with_args(void)24 static void __init of_selftest_parse_phandle_with_args(void)
25 {
26 struct device_node *np;
27 struct of_phandle_args args;
28 int rc, i;
29 bool passed_all = true;
30
31 pr_info("start\n");
32 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
33 if (!np) {
34 pr_err("missing testcase data\n");
35 return;
36 }
37
38 for (i = 0; i < 7; i++) {
39 bool passed = true;
40 rc = of_parse_phandle_with_args(np, "phandle-list",
41 "#phandle-cells", i, &args);
42
43 /* Test the values from tests-phandle.dtsi */
44 switch (i) {
45 case 0:
46 passed &= !rc;
47 passed &= (args.args_count == 1);
48 passed &= (args.args[0] == (i + 1));
49 break;
50 case 1:
51 passed &= !rc;
52 passed &= (args.args_count == 2);
53 passed &= (args.args[0] == (i + 1));
54 passed &= (args.args[1] == 0);
55 break;
56 case 2:
57 passed &= (rc == -ENOENT);
58 break;
59 case 3:
60 passed &= !rc;
61 passed &= (args.args_count == 3);
62 passed &= (args.args[0] == (i + 1));
63 passed &= (args.args[1] == 4);
64 passed &= (args.args[2] == 3);
65 break;
66 case 4:
67 passed &= !rc;
68 passed &= (args.args_count == 2);
69 passed &= (args.args[0] == (i + 1));
70 passed &= (args.args[1] == 100);
71 break;
72 case 5:
73 passed &= !rc;
74 passed &= (args.args_count == 0);
75 break;
76 case 6:
77 passed &= !rc;
78 passed &= (args.args_count == 1);
79 passed &= (args.args[0] == (i + 1));
80 break;
81 case 7:
82 passed &= (rc == -EINVAL);
83 break;
84 default:
85 passed = false;
86 }
87
88 if (!passed) {
89 int j;
90 pr_err("index %i - data error on node %s rc=%i regs=[",
91 i, args.np->full_name, rc);
92 for (j = 0; j < args.args_count; j++)
93 printk(" %i", args.args[j]);
94 printk(" ]\n");
95
96 passed_all = false;
97 }
98 }
99
100 /* Check for missing list property */
101 rc = of_parse_phandle_with_args(np, "phandle-list-missing",
102 "#phandle-cells", 0, &args);
103 passed_all &= (rc == -EINVAL);
104
105 /* Check for missing cells property */
106 rc = of_parse_phandle_with_args(np, "phandle-list",
107 "#phandle-cells-missing", 0, &args);
108 passed_all &= (rc == -EINVAL);
109
110 /* Check for bad phandle in list */
111 rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle",
112 "#phandle-cells", 0, &args);
113 passed_all &= (rc == -EINVAL);
114
115 /* Check for incorrectly formed argument list */
116 rc = of_parse_phandle_with_args(np, "phandle-list-bad-args",
117 "#phandle-cells", 1, &args);
118 passed_all &= (rc == -EINVAL);
119
120 pr_info("end - %s\n", passed_all ? "PASS" : "FAIL");
121 }
122
of_selftest(void)123 static int __init of_selftest(void)
124 {
125 struct device_node *np;
126
127 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
128 if (!np) {
129 pr_info("No testcase data in device tree; not running tests\n");
130 return 0;
131 }
132 of_node_put(np);
133
134 pr_info("start of selftest - you will see error messages\n");
135 of_selftest_parse_phandle_with_args();
136 pr_info("end of selftest - %s\n", selftest_passed ? "PASS" : "FAIL");
137 return 0;
138 }
139 late_initcall(of_selftest);
140